LOW-ENERGY ETA-PHOTOPRODUCTION FROM NUCLEONS AND NUCLEI

被引：20

作者：

BENNHOLD, C

TANABE, H

机构：

[1] Institut für Kernphysik, Johannes-Gutenberg-Universität

来源：

PHYSICS LETTERS B | 1990年 / 243卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(90)90947-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The photoproduction of η mesons off nucleons is studied near threshold based on an isobar model. Using the reactions πN→πN, πN→ππN and π-p→ηn to fix the hadronic vertices as well as the resonance propagators, and the process γN→πN to constrain the electromagnetic vertices, good predictions for the γp→ηp cross sections are obtained. This η photoproduction amplitude is then used to estimate cross sections for coherent η production on closed-shell nuclei in a standard DWIA framework. We find that the cross section is dominated by the D13(1520) isobar while the effects of the S11(1535) and P11(1440) resonances are small. © 1990.

引用

页码：13 / 17

页数：5

共 28 条

[1] KAON PHOTOPRODUCTION OPERATOR FOR USE IN NUCLEAR-PHYSICS [J].

ADELSECK, RA ;

BENNHOLD, C ;

WRIGHT, LE .

PHYSICAL REVIEW C, 1985, 32 (05) :1681-1692

[2]

Alekhin S.I., 1987, CERNHERA8701

[3] PION-NUCLEON PARTIAL-WAVE ANALYSIS TO 1100 MEV [J].

ARNDT, RA ;

FORD, JM ;

ROPER, LD .

PHYSICAL REVIEW D, 1985, 32 (05) :1085-1103

[4]

ARNDT RA, 1989, VIRGINIA POLYTECHNIC

[5] ETA PHOTOPRODUCTION CROSS-SECTION FOR INCIDENT PHOTON ENERGIES FROM 800 TO 1000 MEV [J].

BACCI, C ;

PENSO, G ;

SALVINI, G ;

MENCUCCINI, C ;

SILVESTRINI, V .

NUOVO CIMENTO A, 1966, 45 (04) :983-+

[6] ANGULAR DISTRIBUTION FOR ETA-MESON PHOTOPRODUCTION FROM HYDROGEN AT 775-850 MEV [J].

BACCI, C ;

BALDINIC.R ;

MENCUCCI.C ;

REALE, A ;

SPINETTI, M ;

ZALLO, A .

PHYSICAL REVIEW LETTERS, 1968, 20 (11) :571-&

[7] KAON PHOTOPRODUCTION FROM NUCLEI IN A RELATIVISTIC NUCLEAR-MODEL [J].

BENNHOLD, C ;

WRIGHT, LE .

PHYSICAL REVIEW C, 1989, 39 (03) :927-941

[8] OFF-SHELL MODEL FOR THRESHOLD PIONIC ETA-PRODUCTION ON A NUCLEON AND FOR ETA-N SCATTERING [J].

BHALERAO, RS ;

LIU, LC .

PHYSICAL REVIEW LETTERS, 1985, 54 (09) :865-868

[9]

BROWN RM, 1979, NUCL PHYS B, V153, P89, DOI 10.1016/0550-3213(79)90593-5

[10] RELATIVISTIC DISPERSION RELATION APPROACH TO PHOTOMESON PRODUCTION [J].

CHEW, GF ;

GOLDBERGER, ML ;

LOW, FE ;

NAMBU, Y .

PHYSICAL REVIEW, 1957, 106 (06) :1345-1355

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